/* ============================================================
   RCDAG — Feuille de styles principale
   Palette : bleu & blanc, design clean & institutionnel
   ============================================================ */

:root {
  --blue-900: #0a2540;
  --blue-800: #0b3e88;
  --blue-700: #0057b7;   /* bleu principal */
  --blue-600: #1e6fd9;
  --blue-500: #3b8bf0;
  --blue-100: #e6f0ff;
  --blue-50:  #f5f9ff;

  --white:    #ffffff;
  --grey-50:  #f8fafc;
  --grey-100: #f1f5f9;
  --grey-200: #e2e8f0;
  --grey-300: #cbd5e1;
  --grey-500: #64748b;
  --grey-700: #334155;
  --grey-900: #0f172a;

  --radius:    12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(10,37,64,.06);
  --shadow:    0 6px 24px rgba(10,37,64,.08);
  --shadow-lg: 0 20px 40px rgba(10,37,64,.12);

  --container: 1180px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--grey-900);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--blue-700); text-decoration: none; transition: color .2s; }
a:hover { color: var(--blue-800); }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.2; margin: 0 0 .6em; color: var(--grey-900); }
h1 { font-size: clamp(2rem, 4.2vw, 3.25rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); letter-spacing: -.015em; }
h3 { font-size: 1.25rem; }
p  { margin: 0 0 1em; color: var(--grey-700); }
ul { margin: 0 0 1em; padding-left: 1.2em; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: var(--radius);
  font-weight: 600; font-size: 15px; cursor: pointer;
  border: 1px solid transparent; transition: all .2s ease;
  text-decoration: none; line-height: 1;
}
.btn-primary { background: var(--blue-700); color: var(--white); }
.btn-primary:hover { background: var(--blue-800); color: var(--white); transform: translateY(-1px); box-shadow: var(--shadow); }
.btn-outline { background: transparent; color: var(--blue-700); border-color: var(--blue-700); }
.btn-outline:hover { background: var(--blue-700); color: var(--white); }
.btn-ghost { background: var(--blue-50); color: var(--blue-700); }
.btn-ghost:hover { background: var(--blue-100); }
.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--grey-200);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--grey-900); font-size: 18px; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--blue-700), var(--blue-500));
  color: var(--white); display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px; letter-spacing: 0;
}
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a { color: var(--grey-700); font-weight: 500; font-size: 15px; }
.main-nav a:hover, .main-nav a.active { color: var(--blue-700); }
.main-nav a.btn-primary { color: var(--white); }
.main-nav a.btn-primary:hover { color: var(--white); }
.nav-toggle { display: none; flex-direction: column; gap: 4px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--grey-900); }

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: 90px 0 110px; overflow: hidden;
  background: linear-gradient(180deg, var(--blue-50) 0%, var(--white) 100%);
}
.hero::before {
  content: ''; position: absolute; top: -40%; right: -10%;
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,87,183,.09), transparent 60%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 820px; }
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; background: var(--blue-100); color: var(--blue-800);
  border-radius: 999px; font-size: 13px; font-weight: 600; margin-bottom: 22px;
}
.hero h1 span { color: var(--blue-700); }
.hero .lead { font-size: clamp(1.05rem, 1.5vw, 1.2rem); color: var(--grey-700); max-width: 620px; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 56px; }
.section-title .eyebrow {
  display: inline-block; color: var(--blue-700); font-weight: 700;
  text-transform: uppercase; font-size: 13px; letter-spacing: .12em; margin-bottom: 10px;
}
.section-title p { max-width: 620px; margin: 0 auto; }

/* ---------- Features ---------- */
.features-grid {
  display: grid; gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.feature {
  padding: 30px; background: var(--white); border: 1px solid var(--grey-200);
  border-radius: var(--radius-lg); transition: all .25s;
}
.feature:hover { border-color: var(--blue-500); box-shadow: var(--shadow); transform: translateY(-4px); }
.feature .icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--blue-100); color: var(--blue-700);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 18px;
}
.feature h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature p { margin: 0; font-size: 15px; }

/* ---------- Produits ---------- */
.bg-grey { background: var(--grey-50); }
.products-grid {
  display: grid; gap: 28px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}
.product-card {
  position: relative; display: flex; flex-direction: column;
  padding: 32px 28px; background: var(--white);
  border: 1px solid var(--grey-200); border-radius: var(--radius-lg);
  transition: all .25s;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: var(--blue-500); }
.product-card.featured { border: 2px solid var(--blue-700); }
.product-badge {
  position: absolute; top: -12px; right: 24px;
  background: var(--blue-700); color: var(--white);
  padding: 5px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: .04em;
}
.product-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, var(--blue-100), var(--blue-50));
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 22px;
}
.product-card h3 { font-size: 1.3rem; margin-bottom: 8px; }
.product-short { color: var(--grey-500); font-size: 14px; margin-bottom: 20px; min-height: 42px; }
.product-price {
  font-size: 2.1rem; font-weight: 800; color: var(--blue-800);
  margin-bottom: 22px; letter-spacing: -.02em;
}
.product-price small { font-size: 13px; color: var(--grey-500); font-weight: 500; display: block; margin-top: 2px; }
.product-features { list-style: none; padding: 0; margin: 0 0 26px; flex: 1; }
.product-features li {
  position: relative; padding: 8px 0 8px 26px; font-size: 14px;
  color: var(--grey-700); border-bottom: 1px solid var(--grey-100);
}
.product-features li:last-child { border-bottom: 0; }
.product-features li::before {
  content: ''; position: absolute; left: 0; top: 14px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--blue-700);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M20 6L9 17l-5-5' stroke='white' stroke-width='3' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/70% no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M20 6L9 17l-5-5' stroke='white' stroke-width='3' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/70% no-repeat;
}

/* ---------- CTA banner ---------- */
.cta-banner {
  padding: 70px 0; text-align: center;
  background: linear-gradient(135deg, var(--blue-800), var(--blue-700));
  color: var(--white); border-radius: var(--radius-lg);
  margin: 40px auto;
}
.cta-banner h2 { color: var(--white); margin-bottom: 14px; }
.cta-banner p { color: rgba(255,255,255,.85); max-width: 520px; margin: 0 auto 28px; }
.cta-banner .btn-primary { background: var(--white); color: var(--blue-800); }
.cta-banner .btn-primary:hover { background: var(--blue-50); color: var(--blue-800); }

/* ---------- Form ---------- */
.form-wrap { max-width: 700px; margin: 0 auto; }
.form-row { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; color: var(--grey-900); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--grey-300);
  border-radius: var(--radius); font-size: 15px; font-family: inherit;
  background: var(--white); transition: border-color .15s, box-shadow .15s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: 0; border-color: var(--blue-700);
  box-shadow: 0 0 0 3px rgba(0,87,183,.15);
}
.form-group textarea { min-height: 130px; resize: vertical; }
.form-note { font-size: 13px; color: var(--grey-500); }

/* ---------- Alerts ---------- */
.alert {
  padding: 14px 18px; border-radius: var(--radius);
  margin-bottom: 20px; font-size: 14px; border: 1px solid;
}
.alert-success { background: #ecfdf5; color: #065f46; border-color: #a7f3d0; }
.alert-error   { background: #fef2f2; color: #991b1b; border-color: #fecaca; }
.alert-info    { background: var(--blue-50); color: var(--blue-800); border-color: var(--blue-100); }

/* ---------- Pages légales & contenu ---------- */
.page-hero {
  background: linear-gradient(180deg, var(--blue-50), var(--white));
  padding: 70px 0 50px;
  border-bottom: 1px solid var(--grey-200);
}
.page-hero h1 { margin-bottom: 10px; }
.page-hero p { color: var(--grey-500); margin: 0; }
.legal-content {
  max-width: 820px; margin: 0 auto; padding: 60px 0;
}
.legal-content h2 { margin-top: 40px; font-size: 1.4rem; color: var(--blue-800); }
.legal-content h3 { margin-top: 24px; font-size: 1.1rem; }
.legal-content p, .legal-content li { font-size: 15px; color: var(--grey-700); }

/* ---------- Produit détail ---------- */
.product-detail { display: grid; grid-template-columns: 1.4fr 1fr; gap: 60px; align-items: start; }
.product-detail-info .price-big {
  font-size: 3rem; font-weight: 800; color: var(--blue-800); margin: 18px 0 8px; letter-spacing: -.02em;
}
.product-detail-info .price-note { color: var(--grey-500); font-size: 14px; margin-bottom: 30px; }
.product-detail .order-card {
  position: sticky; top: 100px; padding: 32px;
  background: var(--white); border: 1px solid var(--grey-200);
  border-radius: var(--radius-lg); box-shadow: var(--shadow);
}
.product-detail .order-card h3 { margin-bottom: 6px; }
.order-card .price { font-size: 2rem; font-weight: 800; color: var(--blue-800); margin: 10px 0 20px; }
.order-card ul { padding-left: 20px; font-size: 14px; color: var(--grey-700); }

/* ---------- Checkout ---------- */
.checkout-wrap { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: start; }
.checkout-summary {
  position: sticky; top: 100px; padding: 30px;
  background: var(--grey-50); border: 1px solid var(--grey-200);
  border-radius: var(--radius-lg);
}
.summary-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--grey-200); font-size: 15px; }
.summary-row:last-child { border-bottom: 0; }
.summary-total { font-size: 1.2rem; font-weight: 700; color: var(--blue-800); padding-top: 16px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--grey-900); color: #cbd5e1; padding: 60px 0 24px; margin-top: 40px;
}
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: var(--white); }
.footer-grid {
  display: grid; gap: 40px;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-grid h4 { color: var(--white); font-size: 14px; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 18px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { padding: 5px 0; font-size: 14px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: var(--white); font-weight: 800; font-size: 20px; margin-bottom: 14px; }
.footer-tagline { color: #94a3b8; font-size: 14px; margin-bottom: 14px; }
.footer-address { color: #94a3b8; font-size: 13px; }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  padding-top: 24px; color: #64748b; font-size: 12px;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .product-detail { grid-template-columns: 1fr; }
  .checkout-wrap { grid-template-columns: 1fr; }
  .checkout-summary { position: static; }
  .product-detail .order-card { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--white);
    padding: 20px 24px; border-bottom: 1px solid var(--grey-200);
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; width: 100%; border-bottom: 1px solid var(--grey-100); }
  .main-nav a.btn-primary { margin-top: 10px; border-bottom: 0; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  section { padding: 60px 0; }
  .hero { padding: 60px 0 70px; }
}